The following manifesto represents my answer to the question - "As a UX or UI, designer, how do I know when and where to implement motion to support usability?"
Microinteractions
Creating Usability with Motion: The UX in Motion Manifesto
A Lottie is a JSON-based animation file format that enables designers to ship animations on any platform as easily as shipping static assets. They are small files that work on any device and can scale up or down without pixelation.
Agile is an iterative approach to project management and software development that helps teams deliver value to their customers faster and with fewer headaches. Instead of betting everything on a "big bang" launch, an agile team delivers work in small, but consumable, increments. Requirements, plans, and results are evaluated continuously so teams have a natural mechanism for responding to change quickly.